getSession() during _closeSession() can lead to strange errors

[jamoore]

090326T22:24:54 DEBUG root:720:logout: killing connection "S:60c7c47e-3039-4538-82e2-038d73d43f95#jcb"
090326T22:24:54 DEBUG root:720:CONN:close rollup-admin:720:60c7c47e-3039-4538-82e2-038d73d43f95
090326T22:24:55 WARNING blitz_gateway:720:Traceback (most recent call last):
 File "/home/weblitz/JcbProduction/blue/weblitz/weblitz_gateway/blitz_gateway/__init__.py", line 227, in _closeSession
   s = self.c.sf.getSessionService().getSession(self._sessionUuid)
 File "/home/weblitz/JcbProduction/red/lib/python/omero_API_ice.py", line 1618, in getSession
   return _M_omero.api.ISession._op_getSession.invoke(self, ((sessionUuid, ), _ctx))
UnknownException: exception ::Ice::UnknownException
{
   unknown = org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: ome.model.meta.Experimenter.groupExperimenterMapCountPerOwne
r, no session or session was closed
       at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:358)
       at org.hibernate.c

received by weblitz when calling ISessionPrx.getSession(uuid). There's possibly a race condition on some shared session instance.

---

Full server exception:

2009-03-26 18:24:54,117 ERROR [rg.hibernate.LazyInitializationException] (l.Server-4) failed to lazily initialize a collection of role: ome.model.meta.Experimenter.groupExperimenterMapCountPerOwner, no session or session was closed
org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: ome.model.meta.Experimenter.groupExperimenterMapCountPerOwner, no session or session was closed
	at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:358)
	at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:350)
	at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:343)
	at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86)
	at org.hibernate.collection.PersistentMap.entrySet(PersistentMap.java:242)
	at ome.util.ContextFilter.filter(ContextFilter.java:135)
	at ome.util.ModelMapper.filter(ModelMapper.java:82)
	at ome.model.meta.Experimenter.acceptFilter(Experimenter.java:1087)
	at omero.util.IceMapper.filter(IceMapper.java:880)
	at ome.model.internal.Details.acceptFilter(Details.java:365)
	at omero.util.IceMapper.filter(IceMapper.java:880)
	at ome.model.meta.Session.acceptFilter(Session.java:950)
	at omero.util.IceMapper.filter(IceMapper.java:880)
	at ome.util.ModelMapper.map(ModelMapper.java:50)
	at omero.util.IceMapper.handleOutput(IceMapper.java:1009)
	at ome.services.blitz.util.IceMethodInvoker.invoke(IceMethodInvoker.java:196)
	at ome.services.throttling.Callback.run(Callback.java:55)
	at ome.services.throttling.InThreadThrottlingStrategy.callInvokerOnRawArgs(InThreadThrottlingStrategy.java:37)
	at ome.services.blitz.impl.AbstractAmdServant.callInvokerOnRawArgs(AbstractAmdServant.java:114)
	at ome.services.blitz.impl.SessionI.getSession_async(SessionI.java:109)
	at omero.api._ISessionTie.getSession_async(_ISessionTie.java:134)
	at omero.api._ISessionDisp.___getSession(_ISessionDisp.java:234)
	at omero.api._ISessionDisp.__dispatch(_ISessionDisp.java:573)
	at IceInternal.Incoming.invoke(Incoming.java:166)
	at Ice.ConnectionI.invokeAll(ConnectionI.java:2045)
	at Ice.ConnectionI.message(ConnectionI.java:977)
	at IceInternal.ThreadPool.run(ThreadPool.java:575)
	at IceInternal.ThreadPool.access$100(ThreadPool.java:12)
	at IceInternal.ThreadPool$EventHandlerThread.run(ThreadPool.java:951)